any characteristic of a material that can be observed or measured without changing the composition of the substances in a material is a physical or chemical change?

When gas particles collide with a surface

What is the relationship between atoms and static electricity

A 6.0M solution HCl is diluted to 1.0M How many milliliters of the 6.0M solution would be used to prepare 100. o mL of the diluted 1.0M solution?

When 0.455 g of anthracene, c14h10, is combusted in a bomb calorimeter that has a water jacket containing 500.0 g of water, the temperature of the water increases by 8.63°c. assuming that the specific heat of water is 4.

In the chemistry laboratory why do scientists use a mortal and pestle

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound? A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

A sample of an unknown compound was decomposed and found to be composed of 1.36 mol oxygen, 4.10 mol hydrogen, and 2.05 mol carbon.

When a transition metal reacts with chlorine, what types of bonds are formed between the two elements? A) ionic bonds B) covalent bonds C) transition bonds D) No bonds are formed.

How many grams of hcl are produced when 10.0 g of cl2 and 1.00 g of h2 react? h2 (g) cl2 (g) - - - > 2 hcl (g) ?

A person has a mass of 1000g and an acceleration of 20 m/s/s. What is the force on the person? A.) 20000 N B.) 2000N C.) 20N D.) 200N